<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>10赋值运算</title>
	<script>
		// 把100赋值给a变量
		// 把右边的值赋值给左边变量
		var a = 100;

		var b = a + 20;//120


		a = a + 50;//a=>150
		a += 50;//简写

		b -= 60;//60=>b = b - 60;
		/*
			a *=2;
			b /= 10;
			b %= 5;
		 */
	</script>
</head>
<body>
	
</body>
</html>